THE ADVANCED FLUID BED CALCINER: IMPROVED PERFORMANCE WITH FLEXIBLE OPERATION

Schmidt, H.W.

The Circulating Fluid Bed Technology (CFB) has been used by the industry for more than 25 years and represents an installed capacity of more than 10 million tpa of alumina in 32 different units. Based on this experience, the paper describes an improved concept of the standard technology which offers lower heat consumption figures. The major modifications are in the preheating area and the cooling section of the plant whilst retaining the proven features of high flexibility, unique temperature control, high availability, low maintenance, reliable performance and simple steady operation. The modification of the design are in such a way that investment cost have been reduced in single units of a capacity up to 3000 tpd of alumina.